Triggered field device data collection in a process control system
    1.
    发明授权
    Triggered field device data collection in a process control system 有权
    在过程控制系统中触发现场设备数据采集

    公开(公告)号:US07516043B2

    公开(公告)日:2009-04-07

    申请号:US10631254

    申请日:2003-07-31

    IPC分类号: G01F19/00

    摘要: A diagnostic system and method for a field device in a process control apparatus is provided. At least one sensor is associated with the process control apparatus, and a computer is adapted to receive data from the sensor and to detect an occurrence of a predetermined process event. A memory device is operatively connected to the computer and adapted to store sensor data received by the computer at a time corresponding to the occurrence of the predetermined process event.

    摘要翻译: 提供了一种用于过程控制装置中的现场设备的诊断系统和方法。 至少一个传感器与过程控制装置相关联,并且计算机适于从传感器接收数据并检测预定过程事件的发生。 存储器设备可操作地连接到计算机,并且适于在对应于预定处理事件的发生的时间存储由计算机接收的传感器数据。

    Methods and apparatus for operating and performing diagnostics in a control loop of a control valve
    3.
    发明授权
    Methods and apparatus for operating and performing diagnostics in a control loop of a control valve 有权
    用于在控制阀的控制回路中操作和执行诊断的方法和装置

    公开(公告)号:US06999853B2

    公开(公告)日:2006-02-14

    申请号:US10828706

    申请日:2004-04-21

    IPC分类号: G05D11/00

    摘要: A control loop of a control valve is operated using outlet pressure from a pneumatic amplifier as the control parameter. The control loop may be operated continuously in pressure control mode, or may be switched from another mode, such as travel control mode, to pressure control mode in response to certain operating conditions such as operation in the cutoff range, operation with the throttling element engaging a travel stop, or as a backup in the event of primary control parameter sensor failure. Operating the control loop in pressure control mode further allows diagnostics to be performed on the control loop components, even when the system is operating in cutoff range or has engaged a travel stop. The diagnostics may be performed using pressure and displacement sensors normally provided with a positioner. A processor may be programmed to receive data from the sensors and generate fault signals according to a logic sub-routine. The logic sub-routine may include calculating mass flow of control fluid through pneumatic amplifier outlet ports and comparing other operating parameters to detect leaks and blockages in the control loop components. Once a fault is detected, the location of the root cause of the fault may be identified by characterizing operating parameters of the control loop at the time of the fault.

    摘要翻译: 使用来自气动放大器的出口压力作为控制参数来操作控制阀的控制回路。 控制回路可以在压力控制模式下连续工作,或者可以根据诸如行程控制模式的其他模式切换到压力控制模式,以响应某些操作条件,例如在截止范围内的操作,使用节流元件接合的操作 一次旅行停止,或作为主要控制参数传感器故障的备份。 在压力控制模式下操作控制回路进一步允许对控制回路部件执行诊断,即使系统在截止范围内运行或已经停止行驶。 可以使用通常设置有定位器的压力和位移传感器来执行诊断。 处理器可以被编程为从传感器接收数据,并根据逻辑子程序产生故障信号。 逻辑子例程可以包括通过气动放大器出口端口计算控制流体的质量流量,并比较其他操作参数以检测控制回路部件中的泄漏和堵塞。 一旦检测到故障,可以通过在故障时表征控制回路的操作参数来识别故障的根本原因的位置。

    Method and apparatus for performing diagnostics in a control loop of a control valve
    4.
    发明授权
    Method and apparatus for performing diagnostics in a control loop of a control valve 有权
    用于在控制阀的控制回路中执行诊断的方法和装置

    公开(公告)号:US06954683B2

    公开(公告)日:2005-10-11

    申请号:US10644207

    申请日:2003-08-20

    摘要: Method and apparatus for performing diagnostics in a pneumatic control loop for a control valve. Pressure and displacement sensors normally provided with a positioner are used to detect operating parameters of the control loop. A processor is programmed to receive feedback from the sensors and generate fault signals according to a logic sub-routine. The logic sub-routine may include calculating mass flow of control fluid through spool valve outlet ports and comparing other operating parameters of the control fluid to detect leaks and blockages in the control loop. Once a fault is detected, the location of the root cause of the fault may be identified by characterizing operating parameters of the control loop at the time of the fault.

    摘要翻译: 用于在用于控制阀的气动控制回路中执行诊断的方法和装置。 通常设置有定位器的压力和位移传感器用于检测控制回路的运行参数。 处理器被编程为从传感器接收反馈并根据逻辑子程序产生故障信号。 逻辑子程序可以包括通过滑阀出口端口计算控制流体的质量流量,并比较控制流体的其它操作参数以检测控制回路中的泄漏和阻塞。 一旦检测到故障,可以通过在故障时表征控制回路的操作参数来识别故障的根本原因的位置。

    LEAD-LAG FILTER ARRANGEMENT FOR ELECTRO-PNEUMATIC CONTROL LOOPS
    6.
    发明申请
    LEAD-LAG FILTER ARRANGEMENT FOR ELECTRO-PNEUMATIC CONTROL LOOPS 有权
    用于电动气动控制杆的引线过滤器布置

    公开(公告)号:US20090326682A1

    公开(公告)日:2009-12-31

    申请号:US12556036

    申请日:2009-09-09

    IPC分类号: G05D7/00 G05B19/18 G05B15/00

    摘要: A lead-lag input filter is connected ahead of a positioner feedback loop having one or more valve accessories, such as a volume booster or a QEV, to overcome slow dynamics experienced by the accessories when receiving low amplitude change control or set point signals. A user interface is connected to the lead-lag input filter and enables an operator or other control personnel to view and change the operating characteristics of the lead-lag input filter to thereby provide the control loop with any of a number of desired response characteristics.

    摘要翻译: 引导滞后输入滤波器连接在具有一个或多个阀附件(例如音量增强器或QEV)的定位器反馈回路之前,以克服附件在接收低幅度变化控制或设定点信号时经历的慢动力。 用户接口连接到超前滞后输入滤波器,使操作员或其他控制人员可以查看和改变超前滞后输入滤波器的工作特性,从而为控制回路提供多种所需响应特性中的任何一种。

    Lead-lag input filter arrangement for electro-pneumatic control loops
    7.
    发明授权
    Lead-lag input filter arrangement for electro-pneumatic control loops 有权
    用于电动气动控制回路的超前滞后输入滤波器装置

    公开(公告)号:US07593802B2

    公开(公告)日:2009-09-22

    申请号:US10595116

    申请日:2006-04-04

    IPC分类号: G05B15/00

    摘要: A lead-lag input filter is connected ahead of a positioner feedback loop having one or more valve accessories, such as a volume booster or a QEV, to overcome slow dynamics experienced by the accessories when receiving low amplitude change control or set point signals. A user interface is connected to the lead-lag input filter and enables an operator or other control personnel to view and change the operating characteristics of the lead-lag input filter to thereby provide the control loop with any of a number of desired response characteristics.

    摘要翻译: 引导滞后输入滤波器连接在具有一个或多个阀附件(例如音量增强器或QEV)的定位器反馈回路之前,以克服附件在接收低幅度变化控制或设定点信号时经历的慢动力。 用户接口连接到超前滞后输入滤波器,使操作员或其他控制人员可以查看和改变超前滞后输入滤波器的工作特性,从而为控制回路提供多种所需响应特性中的任何一种。

    Method and apparatus for performing diagnostics in a control loop of a control valve
    8.
    发明授权
    Method and apparatus for performing diagnostics in a control loop of a control valve 有权
    用于在控制阀的控制回路中执行诊断的方法和装置

    公开(公告)号:US06678584B2

    公开(公告)日:2004-01-13

    申请号:US10139008

    申请日:2002-05-03

    IPC分类号: G05D1100

    摘要: Method and apparatus for performing diagnostics in a pneumatic control loop for a control valve. Pressure and displacement sensors normally provided with a positioner are used to detect operating parameters of the control loop. A processor is programmed to receive feedback from the sensors and generate fault signals according to a logic sub-routine. The logic sub-routine may include calculating mass flow of control fluid through spool valve outlet ports and comparing other operating parameters of the control fluid to detect leaks and blockages in the control loop. Once a fault is detected, the location of the root cause of the fault may be identified by characterizing operating parameters of the control loop at the time of the fault.

    摘要翻译: 用于在用于控制阀的气动控制回路中执行诊断的方法和装置。 通常设置有定位器的压力和位移传感器用于检测控制回路的运行参数。 处理器被编程为从传感器接收反馈并根据逻辑子程序产生故障信号。 逻辑子程序可以包括通过滑阀出口端口计算控制流体的质量流量,并比较控制流体的其它操作参数以检测控制回路中的泄漏和阻塞。 一旦检测到故障,可以通过在故障时表征控制回路的操作参数来识别故障的根本原因的位置。

    Statistical determination of estimates of process control loop parameters
    9.
    发明授权
    Statistical determination of estimates of process control loop parameters 有权
    过程控制回路参数估计的统计确定

    公开(公告)号:US06466893B1

    公开(公告)日:2002-10-15

    申请号:US09370474

    申请日:1999-08-09

    IPC分类号: G01M1900

    CPC分类号: G05B23/0229 G05B23/0202

    摘要: A method and apparatus statistically determines estimates of one or more process control loop parameters, such as bearing friction, seal friction, total friction, dead band, dead time, oscillation, shaft windup or backlash associated with a device or a control loop within a process control environment. The method and apparatus measures one or more signals within a process control loop when the process control loop is connected on-line within a process control environment, stores the measured signal as signal data and then performs one of a number of statistical analyses on the stored signal data to determine the desired parameter estimate.

    摘要翻译: 一种方法和装置统计地确定一个或多个过程控制回路参数的估计,例如轴承摩擦,密封摩擦,总摩擦,死区,死区时间,振荡,与轴内的装置或控制回路相关的反向间隙 控制环境。 当过程控制环路在过程控制环境中在线连接时,该方法和装置测量过程控制环路内的一个或多个信号,将测量的信号存储为信号数据,然后对所存储的数据进行多个统计分析之一 信号数据以确定期望的参数估计。

    Estimation of process control parameters over predefined travel segments
    10.
    发明授权
    Estimation of process control parameters over predefined travel segments 有权
    过程控制参数在预定行程段上的估计

    公开(公告)号:US07996096B2

    公开(公告)日:2011-08-09

    申请号:US12040493

    申请日:2008-02-29

    摘要: A method of determining a segment-specific estimate of a parameter associated with a process control loop includes receiving signal data corresponding to a signal from a process control loop, storing the signal data, partitioning the stored signal data into a plurality of data segments and performing a statistical analysis on a first one of the plurality of data segments selected from the plurality of data segments to generate a first segment-specific parameter estimate.

    摘要翻译: 确定与过程控制回路相关联的参数的特定于段的估计的方法包括接收对应于来自过程控制回路的信号的信号数据,存储信号数据,将存储的信号数据划分成多个数据段并执行 对从多个数据段中选择的多个数据段中的第一个数据段进行统计分析,以生成第一区段特定参数估计。